text Jakarta Institut Pertanian Bogor 2003 ix, 57 p. : ill, ; 28 cm Agung Kusdianto DUCKS EGGS MANAGEMENT HATCHERIES 636.597 LAP 636.597 KUS t 260623 20260623023221 INLIS000000000000237 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)